Although it has been often suggested ( and stated) that the Mig 15 is a further development of the Ta 183, it is more of a superficial resemblance. The F-86 Sabre owes more to the Me 262 ( with some original me 262 parts actually fitted to the prototype), than does the Mig. The Argentinian "Pulqui" was the direct descendant of Kurt Tanks' design, and was something of a flop. It actually got to fire a couple of shots in anger, but with little other claim to fame. It was overlooked in favour of battle proven second hand Sabres. There is a resemblance to the Mk 3 version of the Ta 183, but that is about it, and the Russians have always claimed that it was an indigenous design. On the other hand, the Russians claim a lot of things that are dubious. I have always believed that the bulk of nations will take the positive aspects of a design, change a couple of things, and then claim it as original, for the sake of national pride.you're thinking of Kurt Tank's Ta 183 (for the MiG 15) ..but not according to Yefim Gordon.
As to 'progress beyond surrender', the French tested the Me 262 and the BMW engines extensively through 46-47 when trying to re-establish their own aero industries. They could easily have put the Me 262 back into service - but of course neither the design nor the engines were 'mature' enough. ( the 003s did though lead to the ATAR - 'R' for Richenbach - a BMW facility) But the pilots at the CEV (Centre d'essais en Vol - flight test centre) didn't like the Me 262 and the French chose not to take the Me 262 any further - like the Russians they bought the RR Nene...